Overview of BLOB (Binary Large Object)

JDBC for Oracle - Herong's Tutorial Examples

∟Oracle BLOB (Binary Large Object) - BLOB

∟Overview of BLOB (Binary Large Object)

This section describes what are BLOB (Binary Large Object) data types and how to work with them.

BLOB (Binary Large Object) is a large collection of binary data stored in a database table. Different database servers handles BLOB differently. But there are some common characteristics like:

BLOB stores binary data, which requires no encoding schema. BLOB data is stored in units of bytes.
BLOB data is usually large. Many database servers offer very high maximum sizes like 4 GB.
BLOB data is usually not directly stored inside the table. It is stored in different storage areas and its reference address is stored inside the table.

JDBC offers an interface, java.sql.Blob, to allow JDBC driver to provide generic functionalities to handle BLOB data in the database.

BLOB data can also be handled as byte arrays: byte[].

BLOB data can also be handled as binary streams with the java.io.InputStream class.

Table of Contents

About This Book

JDBC (Java Database Connectivity) Introduction

JDK (Java SE) Installation

Oracle Express Edition Installation on Windows

Oracle JDBC Drivers

Oracle - Reference Implementation of JdbcRowSet

Oracle - PreparedStatement

Oracle - JBDC CallableStatement

Oracle CLOB (Character Large Object) - TEXT

►Oracle BLOB (Binary Large Object) - BLOB

►Overview of BLOB (Binary Large Object)

Create Tables with CLOB Columns

Inserting BLOB Values with SQL INSERT Statements

Inserting BLOB Values with setBytes() Method

Inserting BLOB Values with setBinaryStream() Method

Closing InputStream Too Early on setBinaryStream()

Retrieving BLOB Values with getBytes() Method

Retrieving BLOB Values with getBinaryStream() Method

Retrieving BLOB Values with getBlob() Method

Inserting BLOB Values with setBlob() Method

Copying BLOB Values to New Rows

Using Connection Pool with JDBC

Archived Tutorials

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